<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
/WEB-INF/jsp<p>
실행 중 문제가 발생했습니다.<br>
관리자 이메일 : admin@abc.com<p>
오류 : <%= request.getAttribute("error_message")%><!-- 출력하라는 거(out.println(request.getAttribute("error_message")) -->
</body>
</html>